The clone trooper cold assault squad or (CAS) was used on very cold planets that mostly no life forms can survive on. These planets are usually 100 degrees below zero. The clone trooper in the middle is an elite pilot and commando. One of the other two troopers is a demolition expert and the other is trained in hand to hand combat.

Quoting ARC Commander Thorn
i just got a fantastic idea,i can't do it because i don't have the pieces but you can! you may have to google this if you've never seen this clone before it is first seen in starwars battle front II,its a purple clone that you unlock by getting kills,the clone holds a gattlin gun that looks cool!
the clones on the left and right would be perfect! if you can make one i'll make you my favorate builder!

Sure! I know what your talking about a galactic marine is what they're called I'll get too it right away.

i just got a fantastic idea,i can't do it because i don't have the pieces but you can! you may have to google this if you've never seen this clone before it is first seen in starwars battle front II,its a purple clone that you unlock by getting kills,the clone holds a gattlin gun that looks cool!
the clones on the left and right would be perfect! if you can make one i'll make you my favorate builder!